Quintura recently made a search page for Seo Book. Their search service is likely going to be more useful for large publishers with millions of pages than it is on a personal blog, but give it a try and see what you think.

Their cloudlike visual search service is a great tool for finding related keyword modifiers used in competing sites, but I don't think we will see such technology front and center at the mainstream search engines anytime soon due to future advertising regulation which will make it harder to integrate ads and make search results more profitable than the current Google format is. Though I would love to see their technology integrated against social bookmarking sites and personal search history data.